| タイトル | The influence of acceleration forces on dendritic growth and grain structure |
| 著者（英） | Johnston, M. H.; Parr, R. A. |
| 著者所属（英） | NASA Marshall Space Flight Center |
| 発行日 | 1982-03-01 |
| 言語 | eng |
| 内容記述 | The results of experiments on the tin-15 wt pct lead system are presented, showing the effects on microstructure of solidification in the presence of acceleration forces from 0.0001 to 5 g for three cooling rates. An increase in the acceleration level is shown to drive fluid flow and cause dendrite remelting, fragmentation, and macrosegregation. The cooling rate impacts the final structure through its control of dendrite arm spacings and permeability to fluid flow. At the low (0.0001 g) acceleration, dendrite arm spacings deviated from the predicted relationship to cooling rate. An explanation for this anomaly is given which considers the temperature and concentration gradients in the low-gravity environment. |
| NASA分類 | METALLIC MATERIALS |
| レポートNO | 82A36321 |
| 権利 | Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/410011 |
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